The 0.1 mile segments are a complete joke, I’ve been on rides sprinting at ~30mph and Strava awards it to someone at 37mph?!
Easy to cheat those short segments on Garmin devices - just set to smart recording instead of 1 sec recording rate.
The other problem is that at 30mph and 1 sec recording rate, trackpoints are 44 feet apart. However you need to consider that GPS accuracy is 16 feet horizontally. So that 0.1 mile segment at best has 12 gps trackpoints, and due to GPS accuracy its pretty easy to lose 2 and only have 10 trackpoints which will inflate speed estimate.
I filed a ticket with Strava about that 18+ months ago, had a long conversation, and after an interesting discussion they concluded with “Unfortunately, this is simply a limitation of our segment matching process at this time and there isn’t any way to change this unless and until we do interpolation of your GPS points to time segment efforts.”